Disegni di fabbrica e layout definitivi dei
sistemi di alimentazione elettrica delle bobine del Tokamak JT-60SA
P. Zito, A. Lampasi, G. Maffia, F. Starace
Report RdS/PAR2013/205
Agenzia nazionale per le nuove tecnologie, l’energia e lo sviluppo economico sostenibile MINISTERO DELLO SVILUPPO ECONOMICO
DISEGNI DI FABBRICA E LAYOUT DEFINITIVI DEI SISTEMI DI ALIMENTAZIONE ELETTRICA DELLE BOBINE DEL
TOKAMAK JT-60SA
P. Zito, A. Lampasi, G. Maffia, F. Starace (ENEA)
Settembre 2014
Report Ricerca di Sistema Elettrico
Accordo di Programma Ministero dello Sviluppo Economico – ENEA
Piano Annuale di Realizzazione 2013
Area: Produzione di Energia Elettrica e Protezione dell’Ambiente
Progetto: Attività di fisica della Fusione complementari a ITER
Obiettivo: Metodi per verifiche di sostenibilità
Responsabile del Progetto: Aldo Pizzuto, ENEA
Index
SOMMARIO ......................................................................................................................................................................... 4
1 INTRODUCTION .......................................................................................................................................................... 5
2 DESCRIPTION OF ACTIVITIES ...................................................................................................................................... 5
2.1 POWER ASSEMBIES ................................................................................................................................................. 5 2.2 CROW BAR THYRISTORS ........................................................................................................................................ 11
3 CONCLUSIONS .......................................................................................................................................................... 22
4 ABBREVIATIONS AND ACRONYMS ........................................................................................................................... 22
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Sommario Nell’ambito del Broader Approach (che è un accordo di cooperazione internazionale tra Unione Europea Euratom e Giappone avente lo scopo di integrare il progetto ITER ed accelerare i tempi per la realizzazione dell'energia da fusione, attraverso attività di R&S relative a tecnologie avanzate per i futuri reattori dimostrativi), l'ENEA deve fornire parte delle alimentazioni elettriche del sistema magnetico di JT-60SA, per un totale di 8 alimentatori ad alta corrente (6 alimentatori per le bobine poloidali CS1, CS2, CS3, CS4, EF1 e EF6, 2 alimentatori per le bobine FPPC Fast Plasma Position Control con relativi interruttori e trasformatori). L’ENEA ha condotto gli studi e la progettazione per la realizzazione di alimentatori AC/DC e relativi trasformatori, per gli avvolgimenti poloidali e di controllo della macchina JT60SA. Le alimentazioni elettriche degli avvolgimenti devono fornire una corrente continua regolabile in grado di riprodurre gli scenari di corrente desiderati. Gli scenari di corrente di un tokamak prevedono una prima fase caratterizzata da una lenta salita (ramp-up) della corrente prodotta dal convertitore a tiristori, fino a un massimo valore prestabilito (20 kA nel caso dei CS). Le specifiche tecniche elaborate definiscono i parametri funzionali del sistema, la modalità di funzionamento e i limiti di esercizio. Il contratto per la fornitura di otto Alimentatori e sei Trasformatori per JT- 60SA PFC PS (CS1 , CS2 , CS3 , CS4 , EF1 e EF6 PS e le due FPPC PS ) è stato assegnato da ENEA al fornitore industriale POSEICO - JEMA in Joint Venture il 01/agosto/2013. Il contratto di appalto è basato su specifiche tecniche e di gestione della qualità sviluppate da ENEA con la stretta collaborazione di F4E e JAEA. Le caratteristiche del sistema e i documenti di specifica tecnica e di gestione della qualità sono stati accuratamente analizzati e discussi, durante i design meeting organizzati.
Il documento descrive le attività svolte correlate alla fase del contratto 2A “lo sviluppo dei disegni di fabbrica e layout, disegni meccanici e funzionali schemi elettrici di potenza, protezione, misure comando e controllo dei sistemi di alimentazione” delle bobine del Tokamak JT-60SA. A tal uopo, si riporta una breve relazione dei componenti utilizzati, i disegni di fabbrica e i layout definitivi. Inoltre, poiché tutta la documentazione fornita è in lingua inglese, i prossimi paragrafi sono riportati in inglese.
1 Introduction The Design Report and layout and drawing are a detailed description of the activity done during the phase 2A of POSEICO/JEMA procurement to provide 8 new Power Supplies (EF1, EF6, CS1, CS2, CS3, CS4, FPPC1, FPPC2) for part of the JT-60SA Poloidal Field and Plasma Position Control Coils power supplies. Power supplies will provide a bipolar DC current, adequate to achieve the required scenarios on the superconducting coils.
2 Description of activities 2.1 Power assembies In order to obtain the maximum modularity for all the different Power Supplies all the PS configurations have been designed using only 4 types of different power assemblies. Only 2 types of thyristors, having the same outline, one type of gate drive board and one type of water cooled heatsink will be used. The types of different fuses are reduced to the minimum. In Table 1 are summarized the main characteristics of the different Power Assemblies.
Power
assembly type
Type Thyristor type Thyristor blocking voltage
VDRM/VRRM
Thyristor diameter
Power Assembly Dimensions
(W x L x H)
(mm)
PSs
Type A Bidirectional (4 thyristors)
AT940P29 2900 V 100 mm 600 x 292 x 585 CS1 – CS4
EF1 –EF6
Type B Bidirectional (4 thyristors)
AT970P34 3400 V 100 mm 600 x 292 x 585 CS2 – CS3
Type C Unidirectional (2 thyristors)
AT940P29 2900 V 100 mm 600 x 292 x 458 EF1 - EF6
FFPPC1 – FPPC2
Type D Unidirectional (2 thyristors)
AT940P29 2900 V 100 mm 600 x 292 x 458 FPPC1 – FPPC2
Table 1 - Main characteristics of the FPPC Power assemblies (the other assembly types are reported for the
purpose to show the modularity used in all configurations).
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Figure 1 – Power Assembly Type A
Figure 2 - Power Assembly Type B
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Figure 3 – Power Assembly Type C
Figure 4 – Power Assembly Type D
All the Power Supplies object of the contract are designed using only 2 types of 100 mm thyristors, with different blocking voltage, in order to obtain the maximum of modularity and to reduce cost of the spare parts and maintenance management. In the following table (Table 2) are reported the types of thyristor used in FPPC PSs and in the other Power Supplies. The FPPC configuration has been confirmed as series connection configuration with 1 Thyristor for leg and direction. The series configuration ensure a fast voltage response of the FPPC PSs.
Power Supply Thyristor code VDRM, VRRM
(V)
ITSM (KA)
Total Quantity (for 1 PS )
Data sheet Code /Issue
CS1 AT940P29 2900 V 75 72 AT940 issue 05A
CS2 AT970P34 3400 V 68 72 AT970 issue 00
CS3 AT970P34 3400 V 68 72 AT970 issue 00
CS4 AT940P29 2900 V 75 72 AT940 issue 05A
EF1 AT940P29 2900 V 75 54 AT940 issue 05A
EF6 AT940P29 2900 V 75 54 AT940 issue 05A
FPPC1 upper AT940P29 2900 V 75 24 AT940 issue 05A
FPPC2 lower AT940P29 2900 V 75 24 AT940 issue 05A
Table 2 - Type of POSEICO Thyristor used for FPPC SCR Rectifier Units (the other thyristor type is reported for the purpose to show the modularity used in all configurations)
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All the thyristors are designed and manufactured by POSEICO
The symbol “S” or “P” in the Thyristor code means: o S= single operation mode o P = parallel operation mode.
Figure 5 and 6 show FPPC PS1 and 2 single line drawings.
Figure 5 – FPPC Power Supply Single line Drawings
Figure 6 - FPPC Power Supply Single line Drawings
2.2 Crow Bar Thyristors In the following Table 3 are reported the type of thyristors used in the Crow Bar.
Power Supply Crow Bar Thyristor
code
VDRM, VRRM
(V)
ITSM (KA)
Quantity of parallel
devices for 1 Crow Bar
Data sheet Code /Issue
CS1 AT940P29 2900V 75 2 x 4 AT940 issue 05A
CS2 AT940P29 2900V 75 2 x 4 AT940 issue 05A
CS3 AT940P29 2900V 75 2 x 4 AT940 issue 05A
CS4 AT940P29 2900V 75 2 x 4 AT940 issue 05A
EF1 AT940P29 2900V 75 2 x 4 AT940 issue 05A
EF6 AT940P29 2900V 75 2 x 4 AT940 issue 05A
FPPC1 upper AT940P29 2900V 75 2 x 4 AT940 issue 05A
FPPC2 lower
AT940P29
2900V 75 2 x 4 AT940 issue 05A
Table 3 - POSEICO Thyristors used in the Crow Bar.
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Figure 7 – Crowbar Power Assembly
Next figures show the plant layout CS PSs and FPPC PSs.
Figure 8 – CS2, CS3 FPPC1 and FPPC2 Plant layout
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Figure 9 – Axonometric view
Figure 10 - Axonometric view
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Figure 11 – FPPC PS Layout
Figure 12 - FPPC PS Layout
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Figure 13 - FPPC PS Layout (frontal e vertical view)
Figure 14 - FPPC PS Layout
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Figure 15 - FPPC PS Layout
Figure 16 - FPPC PS Layout
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3 Conclusions
La relazione riporta una sintesi delle attività svolte correlate alla fase del contratto 2A “lo sviluppo dei disegni di fabbrica e layout, disegni meccanici e funzionali schemi elettrici di potenza, protezione, misure comando e controllo dei sistemi di alimentazione”, delle bobine del Tokamak JT-60SA.
4 Abbreviations and acronyms
Acronym Term Definition
AC Alternating Current –
AI Analog Input
AoC Agreement of Collaboration Framework between F4E and VC-DI to reinsure its commitments towards JAEA under the Procurement Arrangements
BA Broader Approach Agreement between Japan Government and the European Atomic Energy Community for the joint implementation of the activities in the field of fusion energy research
CB, CBU Crowbar (Unit) Electrical circuit used to prevent an overvoltage of a power supply
CC-R Crowbar Control Rack Fires, controls and protects the crowbar thyristors, measuring current, DC voltage and status monitoring, apart from communicating with the MC-R.
CPU Central Processing Unit
CS Central Solenoid Nb3Sn conductor consisting of 4 independent modules
– Customer VC-DI responsible for handling financially and legally the Procurement of its in-kind contributions: for this Procurement, the Customer is ENEA
DC Direct Current –
DDP Detailed Design Phase In this phase, the IS shall detail the technical solutions selected to comply with the requirements
DSP Digital Signal Processor
EU Europe
EM Electromagnetic
EMC Electromagnetic Compatibility Correct operation of different objects in the same electromagnetic environment
ENEA ENEA Italian National Agency for New Technologies, Energy and Sustainable Economic Development
F4E Fusion for Energy
European joint undertaking for ITER and the Development of Fusion Energy: integral part of the JT-60SA Project EU Home Team ensuring the coordination of implementation of the PA and its interfaces with other PAs in BA activities
FPPC FPPC(u,l) FPPC(1,2)
Fast Plasma Position Control Coils used to control the plasma position (classified as upper/lower or 1/2)
HV High Voltage
HVCB High Voltage Circuit Breaker
IAs Implementing Agencies F4E and JAEA
IDC Identification Code Code used for identification and traceability of JT-60SA components
IPC Inter-Process Communication
IS Industrial Supplier The company selected by ENEA to provide the supplies, services or works described in these Technical Specifications, according to a Procurement Contract
JT-60SA JT-60SA JT-60 Super Advanced tokamak, the construction and exploitation of which shall be conducted under the Satellite Tokamak Programme and the Japanese national programme
LV Low Voltage –
MC-R Main Control Rack
MC-R is in charge of the regulation and firing of thyristor rectifiers and at the same time communicating all data/signals to with JT-60SA supervising system PS-SC. It shares data with both RC-R and CC-R.
PF, PFC Poloidal Field (Coil) In a tokamak, the poloidal field travels in circles orthogonal to the toroidal field
PID Plant Integration Document Document defining the technical basis of the JT-60SA Project [ANX1]
PA Procurement Arrangement Framework between F4E and JAEA for the main governing, financial and collaborative requirements for the supply of a procurement package
PS Power Supply –
PS SC Power Supply Supervising
Computer Computer provided by JAEA that communicates with SCSDAS, GPS and SIS and includes an IPS
RCM Remote Control Mode Remote Control Mode of the operations
RC-R Rectifier Control Rack Measures rectifier input and output currents, over temperature and monitors fuse melting status so as to communicate all this data to MC-R through optic fiber links.
RM Reflective Memory Real-time Local Area Network in which each computer always has an up-to-date local copy of the shared memory set
SCADA Supervisory Control And Data
Acquisition
SCB Static Circuit Breaker Switch system based on static devices that supports the BPS to satisfy the SNU time specifications
SCMPS Superconducting Magnet Power
Supply Power systems, electrical and electronic devices to feed the coils of JT-60SA
SCR Silicon Controlled Rectifier
SCSDAS Supervisory Control System and
Data Acquisition System JT-60SA system
STP Satellite Tokamak Programme One of the three projects in the BA activities with the purpose to develop JT-60SA
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TCS Transformer for Central Solenoid
TF, TFC Toroidal Field (Coil) In a tokamak, the toroidal field travels around the torus in circles
TFPPC Transformer for Fast Plasma
Position Control
– Tokamak Device using a magnetic field to confine a plasma in the shape of a torus
TS Technical Specifications The present document
UPS Uninterruptible Power Supply APS provided by JAEA
VC-DI Voluntary Contributor Designated
Institution
Institution appointed by the Government of the countries (Voluntary Contributors) that give voluntary contributions to Euratom for the implementation of the BA activities
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